An extended pipe type screw drill stator forming equipment

Abstract

The present application relates to the technical field of oil exploration, and more particularly to a pipe expanding type screw drill stator forming equipment, comprising: an outer mold structure, comprising an outer mold sleeve, the inner side of the outer mold sleeve having an inner profile line; a mold sleeve driving structure connected with the outer mold structure, used for driving the outer mold structure to rotate along its axis; an inner membrane core, provided in the outer mold sleeve, having a guide neck expanding section and a profile line section, the outer side of the profile line section having an outer profile line; a heating structure, provided at the front side of the guide neck expanding section; a forming support structure, used for supporting the outer mold structure, the mold sleeve driving structure, the inner membrane core and the heating structure; in the processing state, the pipe blank to be processed is heated by the heating structure, expanded in diameter by the guide neck expanding section, and then enters between the outer mold sleeve and the inner membrane core, the outer mold sleeve is driven to rotate by the mold sleeve driving structure, and the stator with the inner and outer profile lines is formed under the action of the inner and outer profile lines, which can solve the problems of deviation, low precision and low processing efficiency of the existing stator forming process.

Description

Technical Field

[0001] This invention relates to the field of petroleum exploration technology, and in particular to a stator forming device for an expanded-tube screw drill bit. Background Technology

[0002] A pneumatic drill (PDM) is a type of downhole power drill that uses drilling fluid as its power source, converting fluid pressure energy into mechanical energy. When the mud pumped out by the mud pump flows through the bypass valve into the motor, a certain pressure difference is formed between the motor's inlet and outlet, driving the rotor to rotate around the stator's axis. The rotational speed and torque are then transmitted to the drill bit through the universal joint and drive shaft, thereby achieving drilling operations.

[0003] The stator is formed by injection molding nitrile rubber into the inner wall of an ordinary steel pipe or a steel pipe with an internal spiral cavity. Currently, the stator is mainly formed by milling. However, during the milling process, it is necessary to continuously control the trajectory of the milling cutter and the position of the stator. This control is difficult, prone to deviations that lead to unqualified stator accuracy, and has low processing efficiency. Summary of the Invention

[0004] This invention provides a stator forming device for an expanded-tube screw drill bit, which can solve the problems of easy deviations leading to unqualified stator accuracy and low processing efficiency when forming stators using existing milling processes.

[0005] This application provides a stator forming device for an expanded-tube screw drill bit, comprising:

[0006] An outer mold structure includes an outer mold sleeve, the inner side of which has an inner profile line;

[0007] A mold drive structure, connected to the outer mold structure, is used to drive the outer mold structure to rotate along its axis;

[0008] The inner core is inserted into the outer mold sleeve and has a guiding neck section and a profile section. The outer profile section has an outer profile line, which corresponds to the inner profile line.

[0009] A heating structure is located on the front side of the guide neck section;

[0010] A forming support structure is provided to support the outer mold structure, the mold sleeve driving structure, the inner mold core, and the heating structure.

[0011] During processing, the tube blank to be processed is heated by the heating structure and expanded in diameter by the guiding necking section before entering between the outer mold sleeve and the inner mold core. The outer mold sleeve is driven to rotate by the mold sleeve driving structure, and a stator with inner and outer profiles is formed under the action of the inner profile and the outer profile.

[0012] In some embodiments, the outer mold structure includes:

[0013] Outer mold sleeve;

[0014] A sleeve support is provided on the molded support structure;

[0015] The connecting sleeve is rotatably disposed within the sleeve support, with one end connected to the mold sleeve drive structure and the other end connected to the outer mold sleeve.

[0016] In some embodiments, the mold drive structure includes:

[0017] A mold drive motor is mounted on the forming support structure;

[0018] A mold sleeve reducer is connected to the mold sleeve drive motor;

[0019] The drive gear is connected to the output shaft of the molded reducer;

[0020] The driven gear meshes with the driving gear on its outer side and is connected to the connecting sleeve on its inner side.

[0021] In some embodiments, the inner membrane core further includes a transition section and a disassembly section. The transition section is disposed between the guide necking section and the profile section, and the disassembly section is connected to the profile section. The tail end of the disassembly section is provided with a disassembly internal thread.

[0022] In some embodiments, the molded support structure includes:

[0023] Molded bed;

[0024] The mold core support assembly is disposed on the molding bed and includes a support stand and support wheels. The support stand is provided with a mounting groove, and the wheel axles on both sides of the support wheels are embedded in the mounting groove.

[0025] In some embodiments, the mold core support assembly further includes a slider and a compression spring disposed under the slider, a groove is provided on the side wall of the mounting groove, the slider is embedded in the groove, and the axle of the support wheel is disposed above the slider.

[0026] In some embodiments, the heating structure includes a heating coil and a coil support connected to the heating coil, the coil support being connected to the molding support structure, and the heating coil being located on the front side of the guide neck section.

[0027] In some embodiments, the stator forming equipment for the expanding screw drill bit further includes:

[0028] The tube blank support mechanism is adjacent to the end of the forming support structure where the heating structure is provided, and has a tube blank positioning structure, which is used to install and move the tube blank to be processed.

[0029] The tube blank pushing mechanism is adjacent to the end of the tube blank support mechanism away from the forming support structure, and has a pushing actuator for pushing the tube blank to be processed between the outer mold sleeve and the inner mold core.

[0030] In some embodiments, the stator forming equipment for the expanding screw drill bit further includes an automatic disassembly mechanism adjacent to the end of the forming support structure away from the heating structure, the automatic disassembly mechanism comprising:

[0031] The bed is automatically disassembled and has guide grooves.

[0032] A movable structure includes a movable frame and a support drive assembly. The bottom of the movable frame is provided with a guide block, which is embedded in the guide groove. The support drive assembly is connected to the movable frame and is used to drive the movable frame to move along the guide groove.

[0033] A stator disassembly structure is provided on the movable frame, including a disassembly drive assembly and a stator disassembly shaft connected to the disassembly drive assembly, wherein the end of the stator disassembly shaft away from the disassembly drive assembly is provided with a disassembly external thread, which is used to connect with the disassembly internal thread.

[0034] In some embodiments, the automatic disassembly mechanism further includes a tube clamping assembly disposed on the molded support structure, the tube clamping assembly comprising:

[0035] At least one pair of cards;

[0036] A hydraulic cylinder for driving the clamping block is connected to the clamping block and is used to drive the clamping block to clamp or release the stator.

[0037] Compared with the prior art, the embodiments of this application provide an inner profile line on the inner side of the outer mold sleeve and an outer profile line on the outer side of the profile line segment of the inner mold core. The inner mold core is inserted into the outer mold sleeve, and a heating structure is located on the front side of the guide necking section of the inner mold core. In the processing state, the tube blank to be processed is heated by the heating structure under the action of external force, and after the diameter of the guide necking section is expanded, it enters between the outer mold sleeve and the inner mold core. The outer mold sleeve is driven to rotate by the mold sleeve driving structure, and a stator with inner and outer profile lines is formed under the action of the inner and outer profile lines. This can solve the problems of easy deviation leading to unqualified stator accuracy and low processing efficiency in the existing stator forming process, and improve the stator processing accuracy and processing efficiency. Attached Figure Description

[0038] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0039] Figure 1 This is a perspective view of a stator forming device for an expanding screw drill bit according to an embodiment of the present invention;

[0040] Figure 2 This is a front view of a stator forming device for an expanding screw drill bit according to an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the forming of a tube blank to be processed according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the outer mold sleeve structure provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of the inner membrane core structure provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the core support assembly structure provided in an embodiment of the present invention.

[0045] Figure label:

[0046] 110. Outer mold structure; 1101. Outer mold sleeve; 1102. Connecting sleeve; 1103. Sleeve support;

[0047] 120. Mold drive structure; 1201. Mold drive motor; 1202. Mold reducer; 1203. Drive gear; 1204. Driven gear;

[0048] 130. Inner membrane core; 1301. Guiding dilatation section; 1302. Transition section; 1303. Shaping section; 1304. Disassembly section;

[0049] 1401. Heating coil;

[0050] 150. Forming support structure; 1501. Forming bed; 1502. Mold core support assembly; 1502A. Support wheel; 1502B. Slider; 1502C. Compression spring; 1502D. Support stand; 1502E. Mounting slot;

[0051] 20. Billet support mechanism; 210. Support bed; 220. Billet positioning structure; 2201. Billet positioning screw; 2202. Billet positioning block; 2203. Billet support groove; 2204. Pressure block;

[0052] 30. Billet pushing mechanism; 310. Pushing bed; 320. Pushing actuator;

[0053] 40. Automatic disassembly mechanism;

[0054] 410. Automatic bed disassembly; 4101. V-shaped guide groove; 4102. Square guide groove;

[0055] 420. Moving structure; 4201. Moving frame; 4202. Support drive assembly; 4202A. Moving drive motor; 4202B. Moving limit plate; 4202C. Moving drive screw; 4202D. Moving guide rod; 4202E. Moving screw box;

[0056] 430. Stator disassembly structure; 4301. Disassembly of drive motor; 4302. Disassembly of reducer; 4303. Stator disassembly shaft; 4304. Disassembly of shaft bracket;

[0057] 440. Pipe clamping assembly; 4401. Clamping block drive cylinder; 4402. Clamping block;

[0058] 50. Tube blank to be processed; 510. Unprocessed stage; 520. Stage of expanding the inner diameter of the blank tube; 530. Processing stage. Detailed Implementation

[0059] The invention will now be further described with reference to the accompanying drawings.

[0060] When conducting underground drilling operations, screw drills are needed to provide power for drilling activities in order to complete the overall drilling work. The core parts of the screw drill are the stator and the rotor. Its working principle is to utilize the multiple different sealed cavities formed between the rotor and the stator when the rotor rotates. The sealed cavities move axially from the suction end to the discharge end, causing the medium to move along this path.

[0061] Stator components are typically formed by injection molding nitrile rubber into the inner wall of ordinary steel pipes or steel pipes with an internal spiral cavity. Injection molding nitrile rubber into the inner wall of a steel pipe with an internal spiral cavity offers superior performance. Currently, the main methods for stator machining are milling and electrolytic forming. However, milling and electrolytic machining processes are difficult to control, prone to deviations that can lead to substandard stator accuracy, and have low processing efficiency.

[0062] To address the aforementioned technical issues, such as Figure 1 , Figure 2 , Figure 3 As shown, this embodiment provides a stator forming device for an expanded-tube screw drill bit, comprising:

[0063] The outer mold structure 110 includes an outer mold sleeve 1101, the inner side of which has an inner profile line;

[0064] The mold drive structure 120 is connected to the outer mold structure 110 and is used to drive the outer mold structure 110 to rotate along its axis.

[0065] The inner core 130 is inserted into the outer mold sleeve 1101 and has a guide neck section 1301 and a profile section 1303. The outer profile section 1303 has an outer profile line on its outer side, and the outer profile line corresponds to the inner profile line.

[0066] A heating structure is located on the front side of the guide neck section 1301;

[0067] The forming support structure 150 is used to support the outer mold structure 110, the mold sleeve drive structure 120, the inner mold core 130, and the heating structure.

[0068] In the processing state, the tube blank 50 to be processed is heated by the heating structure and guided to expand the diameter of the necking section 1301 before entering between the outer mold sleeve 1101 and the inner mold core 130. The outer mold sleeve 1101 is driven to rotate by the mold sleeve driving structure 120 and forms a stator with inner and outer profiles under the action of the inner and outer profiles.

[0069] It should be noted that, as Figure 5 As shown, the guide neck expansion section 1301 has a tapered structure. The taper of the tapered head of the guide neck expansion section 1301 is 8-12°. If the taper is too large, it will be difficult to gradually expand the diameter. If the taper is too small, the guide neck expansion section 1301 will be too long. The inner profile of the outer mold sleeve 1101 is processed according to the outer wall profile of the finished stator, and the outer profile of the inner mold core 130 is processed according to the inner wall profile of the finished stator. Usually, the length of the outer mold sleeve 1101 is less than the length of the inner mold core 130. The length of the profile segment 1303 on the inner mold core 130 is half of the stator lead, but other proportions are also possible. This application does not make specific limitations on this.

[0070] In some embodiments, the outer mold structure 110 includes:

[0071] Outer mold sleeve 1101;

[0072] Sleeve support 1103 is provided on the molded support structure 150;

[0073] The connecting sleeve 1102 is rotatably mounted inside the sleeve support 1103, with one end connected to the mold drive structure 120 and the other end connected to the outer mold sleeve 1101.

[0074] It should be noted that, as Figure 1 , Figure 2 , Figure 4 As shown, the sleeve support 1103 can be a bearing support. The outer mold sleeve 1101 can be fixedly connected to the rear end, i.e. the left side, of the connecting sleeve 1102 by screws. When the mold sleeve driving structure 120 drives the connecting sleeve 1102 to rotate, the connecting sleeve 1102 can drive the outer mold sleeve 1101 to rotate. The outer mold sleeve 1101 is annular and has an inner profile line on its inner side.

[0075] In some embodiments, the mold drive structure 120 includes:

[0076] The mold drive motor 1201 is mounted on the molding support structure 150;

[0077] The mold sleeve reducer 1202 is connected to the mold sleeve drive motor 1201;

[0078] The drive gear 1203 is connected to the output shaft of the die reducer 1202;

[0079] Driven gear 1204 meshes with driving gear 1203 on its outer side and is connected to connecting sleeve 1102 on its inner side.

[0080] It should be noted that the mold sleeve reducer 1202 can reduce the output of the mold sleeve drive motor 1201 and increase the torque to meet the rotation requirements of the outer mold sleeve 1101. The diameter of the driving gear 1203 is smaller than the diameter of the driven gear 1204 to further reduce the rotational speed of the outer mold sleeve 1101 and / or the connecting sleeve 1102. The connecting sleeve 1102 is connected to the inner side of the driven gear 1204 by a key.

[0081] In some embodiments, the inner membrane core 130 further includes a transition section 1302 and a disassembly section 1304. The transition section 1302 is located between the guide necking section 1301 and the profile section 1303. The disassembly section 1304 is connected to the profile section 1303. The tail end of the disassembly section 1304 is provided with a disassembly internal thread.

[0082] It should be noted that the transition section 1302 is a cylindrical smooth rod structure. The diameter of the transition section 1302 is larger than the inner diameter of the tube blank 50 to be processed and is consistent with the major diameter of the inner hole of the stator product. In this way, on the one hand, the tube blank 50 to be processed after being expanded by the guide necking section 1301 can be stabilized, and on the other hand, when the tube blank 50 to be processed is heated and extruded, it can be extruded into a finished stator according to the outer shape line on the inner mold core 130 and the inner shape line on the outer mold sleeve 1101. The distance between the outer mold sleeve 1101 and the inner mold core 130 can be set according to the thickness of the stator product.

[0083] In some embodiments, the molded support structure 150 includes:

[0084] Forming bed 1501;

[0085] The mold core support assembly 1502 is mounted on the molding bed 1501 and includes a support stand 1502D and a support wheel 1502A. The support stand 1502D is provided with a mounting groove 1502E, and the wheel axles on both sides of the support wheel 1502A are embedded in the mounting groove 1502E.

[0086] It should be noted that, as Figure 1 , Figure 2 As shown, since the inner mold core 130 is relatively long and is inserted into the outer mold sleeve 1101, it needs to be supported by the mold core support assembly 1502. For example... Figure 3 As shown, the transition section 1302 of the inner mold core 130 is located inside the connecting sleeve 1102, and the guide necking section 1301 of the inner mold core 130 extends out of the connecting sleeve 1102. The right end face of the upper molding line section 1303 of the inner mold core 130 is flush with the right end face of the outer mold sleeve 1101. In this way, the tube blank 50 to be processed can be expanded in diameter by the guide necking section 1301, and inner and outer molding lines can be formed simultaneously at the outer mold sleeve 1101 and the inner mold core 130.

[0087] In some embodiments, such as Figure 6 As shown, the mold core support assembly 1502 also includes a slider 1502B and a compression spring 1502C located under the slider 1502B. The side wall of the mounting groove 1502E is provided with a sliding groove, the slider 1502B is embedded in the sliding groove, and the axle of the support wheel 1502A is located above the slider 1502B.

[0088] It should be noted that, during the processing of the tube blank 50, the already processed portion of the tube blank 50 will gradually extend to the rear side of the outer mold sleeve 1101, that is... Figure 1 , Figure 2 On the left side, the tube blank 50 to be processed is sleeved on the inner mold core 130. It is necessary to support the protruding tube blank 50 and the inner mold core 130 at the same time. By setting the slider 1502B and the compression spring 1502C located under the slider 1502B, the roller can move freely up and down according to the weight it bears, so as to support items of different weights and ensure that the tube blank 50 to be processed, the inner mold core 130 and the outer mold sleeve 1101 are coaxially set.

[0089] It should be noted that the forming support structure 150 typically includes multiple mold core support assemblies 1502. These multiple mold core support assemblies 1502 are spaced apart along the length of the forming bed 1501. Thus, when the protruding portion of the tube blank 50 to be processed is in the form, the mold core support assembly 1502 can automatically adjust its height to support both the inner mold core 130 and the inner mold core 130 that is fitted to receive the tube blank 50 to be processed. That is, the mold core support assembly 1502 located on the rear side supports the inner mold core 130, and the mold core support assembly 1502 located on the front side supports the inner mold core 130 that is fitted to receive the tube blank 50 to be processed. This ensures the stability of the support and ensures that the tube blank 50 to be processed, the inner mold core 130, and the outer mold sleeve 1101 are coaxially arranged. The mold sleeve drive structure 120 is located on the right side of the outer mold sleeve 1101, and the mold core support assembly 1502 is located on the left side of the outer mold sleeve 1101. The slide groove is typically arranged longitudinally along the mounting groove 1502E to guide and limit the displacement of the support wheel 1502A.

[0090] In some embodiments, the heating structure includes a heating coil 1401 and a coil support connected to the heating coil 1401. The coil support is connected to the molding support structure 150, and the heating coil 1401 is located on the front side of the guide neck section 1301.

[0091] It should be noted that this application does not impose specific limitations on the specific form of the coil support, as long as the heating coil 1401 and the outer mold sleeve 1101 are coaxial. The diameter of the heating coil 1401 can be selected according to actual needs.

[0092] In some embodiments, the stator forming equipment for expanding screw drill bits further includes:

[0093] The tube blank support mechanism 20 is adjacent to one end of the forming support structure 150 which is provided with a heating structure, and has a tube blank positioning structure 220, which is used to install and move the tube blank 50 to be processed.

[0094] The tube blank pushing mechanism 30 is adjacent to the end of the tube blank support mechanism 20 away from the forming support structure 150, and has a pushing actuator 320, which is used to push the tube blank 50 to be processed between the outer mold sleeve 1101 and the inner mold core 130.

[0095] It should be noted that, as Figure 1 As shown, the billet support mechanism 20 is located on the right side of the forming support structure 150. The billet support mechanism 20 includes a support bed 210 and a billet positioning structure 220 disposed on the support bed 210. The billet positioning structure 220 includes:

[0096] Multiple billet positioning screws 2201, with both ends of the billet positioning screws 2201 rotatably connected to the support bed 210;

[0097] The billet positioning block 2202 is provided on the billet positioning screw 2201;

[0098] The tube blank support groove 2203 is located above the tube blank positioning screw 2201 and is connected to the tube blank positioning block 2202, and is used to place the tube blank 50 to be processed.

[0099] A positioning drive structure is used to drive the tube blank positioning screw 2201 to rotate, thereby moving the tube blank support groove 2203;

[0100] It should be noted that the billet support groove 2203 is a V-shaped groove, and multiple billet positioning screws 2201 are spaced apart along the length of the support bed 210. The billet positioning block 2202 can be a nut seat. The billet positioning block 2202 can move with the rotation of the billet positioning screw 2201, thereby driving the billet support groove 2203 to move along the width of the support bed 210. The positioning drive structure can be a servo motor and a synchronous belt or synchronous gear connected to the servo motor. The servo motor is located at the end of a billet positioning screw 2201 and meshes with other billet positioning screws 2201 through a synchronous belt or synchronous gear. When using gear meshing transmission, an intermediate wheel can be set for transmission.

[0101] It should be noted that the tube blank positioning structure 220 also includes a pressure block 2204. The tube blank support groove 2203 has symmetrically arranged threaded holes on both sides. The pressure block 2204 is installed on the tube blank positioning groove by bolts and symmetrical threaded holes. The pressure block 2204 has a V-shaped pressure groove. The V-shaped pressure groove and the tube blank support groove 2203 cooperate with each other to limit the tube blank 50 to be processed. Usually, the tube blank support groove 2203 has multiple symmetrical threaded holes. Multiple pressure blocks 2204 are installed at multiple symmetrical threaded holes to fix the tube blank 50 to be processed.

[0102] It should be noted that after placing the tube blank 50 to be processed on the tube blank support groove 2203 and installing the pressure block 2204, there is usually a certain rotation gap between the tube blank 50 to be processed and the V-shaped pressure groove of the pressure block 2204 so that the tube blank 50 to be processed can rotate freely.

[0103] It should be noted that when positioning and moving the tube blank 50 to be processed, the tube blank support groove 2203 is first moved to the front or rear side of the outer mold sleeve 1101 by the positioning drive structure. Then, the tube blank 50 to be processed is placed on the tube blank support groove 2203, and multiple pressure blocks 2204 are installed in sequence. Then, the tube blank support groove 2203 is moved to the central axis by the positioning drive structure, that is, coaxial with the outer mold sleeve 1101, thus completing the installation and positioning of the tube blank 50 to be processed.

[0104] It should be noted that the tube blank pushing mechanism 30 includes a pushing bed 310 and a pushing actuator 320 disposed on the pushing bed 310. The pushing actuator 320 is coaxially arranged with the outer mold sleeve 1101. After the tube blank 50 to be processed is installed and positioned, the pushing actuator 320 can push the tube blank 50 to be processed between the outer mold sleeve 1101 and the inner mold core 130 for forming processing. The pushing actuator 320 can be a pushing cylinder, and the pushing bed 310 can be a cylinder support.

[0105] In some embodiments, the stator forming equipment for the expanding screw drill bit further includes an automatic disassembly mechanism 40 adjacent to the end of the forming support structure 150 away from the heating structure. The automatic disassembly mechanism 40 includes:

[0106] The bed 410 is designed for automatic disassembly and is equipped with guide grooves.

[0107] The movable structure 420 includes a movable frame 4201 and a support drive assembly 4202. The bottom of the movable frame 4201 is provided with a guide block, which is embedded in a guide groove. The support drive assembly 4202 is connected to the movable frame 4201 and is used to drive the movable frame 4201 to move along the guide groove.

[0108] The stator disassembly structure 430 is mounted on the movable frame 4201 and includes a disassembly drive assembly and a stator disassembly shaft 4303 connected to the disassembly drive assembly. The stator disassembly shaft 4303 has a disassembly external thread at the end away from the disassembly drive assembly, which is used to connect with the disassembly internal thread.

[0109] It should be noted that, as Figure 1 , Figure 2 As shown, the automatic disassembly bed 410 is located on the left side of the forming support structure 150. The guide groove includes a V-shaped guide groove 4101 and a square guide groove 4102. The automatic disassembly bed 410 is provided with two support plates, one of which is provided with a V-shaped guide groove 4101 and the other is provided with a square guide groove 4102. The guide groove can limit the movement direction of the moving frame 4201 to prevent deviation.

[0110] It should be noted that the bracket drive assembly 4202 includes a mobile drive motor 4202A, a mobile drive screw 4202C connected to the mobile start motor, and a mobile screw box 4202E threadedly connected to the mobile drive screw 4202C. Each end of the mobile drive screw 4202C is provided with a mobile limit plate 4202B, which is used to limit the displacement of the mobile screw box 4202E.

[0111] It should be noted that the bracket drive assembly 4202 also includes two movable guide rods 4202D. The movable guide rods 4202D are inserted through the movable screw box 4202E. The two ends of the movable guide rods 4202D are respectively connected to two movable limit plates 4202B, which are used to guide the movement of the movable screw box 4202E to prevent deviation during the movement.

[0112] It should be noted that the stator disassembly structure 430 includes a disassembly drive motor 4301, a disassembly reducer 4302, a stator disassembly shaft 4303, and a disassembly shaft bracket 4304. The disassembly drive motor 4301 is mounted on the movable frame 4201. The disassembly drive motor 4301 is connected to the disassembly reducer 4302. The disassembly reducer 4302 is connected to the stator disassembly shaft 4303. The disassembly shaft bracket 4304 is used to support the stator disassembly shaft 4303.

[0113] In some embodiments, the automatic disassembly mechanism 40 further includes a tube clamping assembly 440 disposed on the molding support structure 150, the tube clamping assembly 440 including:

[0114] At least one pair of 4402 cards;

[0115] The hydraulic cylinder 4401 is connected to the clamping block 4402 and is used to drive the clamping block 4402 to clamp or release the stator.

[0116] It should be noted that multiple pairs of clamping blocks 4402 can be arranged along the length of the forming support structure 150 to clamp or loosen the inner mold core 130 with the stator. The clamping blocks 4402 are provided with V-shaped grooves. When clamping the stator, the clamping block driving cylinder 4401 drives the paired clamping blocks 4402 to move inward synchronously to clamp the stator. When loosening the stator, the clamping block driving cylinder 4401 drives the paired clamping blocks 4402 to move outward synchronously to loosen the stator.

[0117] It should be noted that during the forming process of the tube blank 50, the tube blank 50 is placed in the tube blank support groove 2203, and the pressure block 2204 is fixed on the tube blank support groove 2203. Then, the tube blank support groove 2203 is moved to the coaxial position with the outer mold sleeve 1101 by the tube blank positioning structure 220. The tube blank 50 is pushed to the heating structure by the pushing actuator 320. After being heated and softened by the heating coil 1401, the tube blank 50 enters between the outer mold sleeve 1101 and the inner mold core 130. Under the rotation of the outer mold sleeve 1101, the inner profile line on the outer mold sleeve 1101 and the outer profile line on the inner mold core 130 cooperate to extrude and form the tube blank 50 in the radial direction. Figure 3As shown, the tube blank 50 to be processed can be divided into an unprocessed stage 510, an enlarged inner diameter stage 520, and a processing stage 530. With the continuous conveying of the tube blank 50, continuous processing of the tube blank is achieved. The formed tube blank or stator portion is fitted onto the light rod portion of the inner mold core and supported by multiple mold core support assemblies 1502. When the push actuator 320 pushes the tube blank 50 to a position close to the front end of the heating coil 1401, the push actuator 320 stops moving, thus completing the forming process of one tube blank 50. The positioning can be detected by a sensor or limit switch when moving the tube blank support groove 2203.

[0118] It should be noted that after the forming process of the tube blank 50 is completed, the moving frame 4201 can be moved to the tail end of the inner mold core 130 by the moving drive motor 4202A, the stator disassembly shaft 4303 can be connected to the disassembly internal thread on the inner mold core 130 by the disassembly drive motor 4301, and then the moving frame 4201 can be driven by the moving drive motor 4202A to move away from the outer mold sleeve 1101, thereby pulling out the inner mold core 130 with the stator on it from the outer mold sleeve 1101.

[0119] It should be noted that after the inner mold core 130 with the stator is pulled out of the outer mold sleeve 1101, the paired clamping blocks 4402 can be driven by the clamping block drive cylinder 4401 to clamp the inner mold core 130 with the stator. The stator disassembly shaft 4303 is rotated by the disassembly drive motor 4301 so that the stator disassembly shaft 4303 is separated from the inner mold core 130 with the stator. When the stator disassembly shaft 4303 is rotated, the moving drive motor 4202A can synchronously drive the moving frame 4201 away from the outer mold sleeve 1101. Then, the clamping of the inner mold core 130 with the stator can be released to remove the inner mold core 130 with the stator from the mold core support assembly 1502.

[0120] It should be noted that the inner core 130, which is disassembled and fitted with the stator, can be placed on the tube blank support groove 2203 and fixed by the pressure block 2204. Then, a disassembly handle is installed on one end of the inner core 130. The inner core 130 can be removed by rotating the disassembly handle, thus completing the entire forming process of the stator product.

[0121] In summary, compared with the prior art, the embodiments of this application, by setting an inner profile line on the inner side of the outer mold sleeve 1101 and an outer profile line on the outer side of the profile line segment 1303 of the inner mold core 130, inserting the inner mold core 130 into the outer mold sleeve 1101, and setting the heating structure on the front side of the guide necking section 1301 of the inner mold core 130, enable the blank 50 to be processed to enter between the outer mold sleeve 1101 and the inner mold core 130 under the action of external force after being heated by the heating structure and expanded in diameter by the guide necking section 1301. The outer mold sleeve 1101 is driven to rotate by the mold sleeve driving structure 120, and a stator with inner and outer profile lines is formed under the action of the inner and outer profile lines. This can solve the problems of easy deviation leading to unqualified stator accuracy and low processing efficiency in the existing stator forming process, and improve the stator processing accuracy and processing efficiency.

[0122] It should be understood that in the description of this invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0123] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0124] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0125] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0126] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A stator forming device for an expanding type screw drill bit, characterized in that, include: The outer mold structure (110) includes an outer mold sleeve (1101), the inner side of which has an inner profile line; A mold drive structure (120) is connected to the outer mold structure (110) and is used to drive the outer mold structure (110) to rotate along its axis; The inner core (130) is inserted into the outer mold sleeve (1101) and has a guide neck section (1301) and a profile section (1303). The profile section (1303) has an outer profile line on its outer side, and the outer profile line corresponds to the inner profile line. A heating structure is provided on the front side of the guide neck section (1301); A forming support structure (150) is used to support the outer mold structure (110), the mold sleeve driving structure (120), the inner mold core (130), and the heating structure; In the processing state, the tube blank (50) to be processed is heated by the heating structure and expanded by the guide necking section (1301) and then enters between the outer mold sleeve (1101) and the inner mold core (130). The outer mold sleeve (1101) is driven to rotate by the mold sleeve driving structure (120) and a stator with inner and outer profiles is formed under the action of the inner profile and the outer profile. The forming support structure (150) includes a forming bed (1501); The mold core support assembly (1502) is disposed on the molding bed (1501) and includes a support stand (1502D) and a support wheel (1502A). The support stand (1502D) is provided with a mounting groove (1502E), and the wheel axles on both sides of the support wheel (1502A) are embedded in the mounting groove (1502E). The mold core support assembly (1502) also includes a slider (1502B) and a compression spring (1502C) disposed under the slider (1502B). The side wall of the mounting groove (1502E) is provided with a sliding groove, the slider (1502B) is embedded in the sliding groove, and the axle of the support wheel (1502A) is disposed above the slider (1502B).

2. The stator forming equipment for the expanding type screw drill bit according to claim 1, characterized in that, The outer mold structure (110) includes: Outer mold sleeve (1101); A sleeve support (1103) is provided on the molded support structure (150); The connecting sleeve (1102) is rotatably disposed inside the sleeve support (1103), with one end connected to the mold drive structure (120) and the other end connected to the outer mold sleeve (1101).

3. The stator forming equipment for the expanding type screw drill bit according to claim 2, characterized in that, The mold drive structure (120) includes: A mold drive motor (1201) is mounted on the molding support structure (150); The mold reducer (1202) is connected to the mold drive motor (1201); The drive gear (1203) is connected to the output shaft of the molded reducer (1202); The driven gear (1204) meshes with the driving gear (1203) on its outer side and is connected to the connecting sleeve (1102) on its inner side.

4. The stator forming equipment for the expanding type screw drill bit according to claim 1, characterized in that, The inner membrane core (130) further includes a transition section (1302) and a disassembly section (1304). The transition section (1302) is located between the guide neck expansion section (1301) and the profile section (1303). The disassembly section (1304) is connected to the profile section (1303). The tail end of the disassembly section (1304) is provided with a disassembly internal thread.

5. The stator forming equipment for the expanding type screw drill bit according to claim 1, characterized in that, The heating structure includes a heating coil (1401) and a coil support connected to the heating coil (1401). The coil support is connected to the molding support structure (150). The heating coil (1401) is located on the front side of the guide neck section (1301).

6. The stator forming equipment for the expanding type screw drill bit according to claim 1, characterized in that, The expander-type screw drill stator forming equipment also includes: The tube blank support mechanism (20) is adjacent to one end of the forming support structure (150) on which the heating structure is provided, and has a tube blank positioning structure (220), which is used to install and move the tube blank (50) to be processed. The tube blank pushing mechanism (30) is adjacent to the end of the tube blank support mechanism (20) away from the forming support structure (150) and has a pushing actuator (320) for pushing the tube blank (50) to be processed between the outer mold sleeve (1101) and the inner mold core (130).

7. The stator forming equipment for the expanding type screw drill bit according to claim 4, characterized in that, The stator forming equipment for the expanding screw drill also includes an automatic disassembly mechanism (40) adjacent to the end of the forming support structure (150) away from the heating structure. The automatic disassembly mechanism (40) includes: The bed (410) is automatically disassembled and has a guide groove. The movable structure (420) includes a movable frame (4201) and a support drive assembly (4202). The movable frame (4201) has a guide block at its bottom, which is embedded in the guide groove. The support drive assembly (4202) is connected to the movable frame (4201) and is used to drive the movable frame (4201) to move along the guide groove. A stator disassembly structure (430) is provided on the movable frame (4201), including a disassembly drive assembly and a stator disassembly shaft (4303) connected to the disassembly drive assembly. The stator disassembly shaft (4303) has a disassembly external thread at one end away from the disassembly drive assembly, and the disassembly external thread is used to connect with the disassembly internal thread.

8. The stator forming equipment for the expanding type screw drill bit according to claim 7, characterized in that, The automatic disassembly mechanism (40) further includes a tube clamping assembly (440) disposed on the molding support structure (150), the tube clamping assembly (440) comprising: At least one pair of card blocks (4402); A hydraulic cylinder (4401) is connected to the clamping block (4402) and is used to drive the clamping block (4402) to clamp or release the stator.

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